include/asm-x86/smp_64.h

   1 #ifndef __ASM_SMP_H
   2 #define __ASM_SMP_H
   3
   4 /*
   5  * We need the APIC definitions automatically as part of 'smp.h'
   6  */
   7 #include <linux/threads.h>
   8 #include <linux/cpumask.h>
   9 #include <linux/bitops.h>
  10 #include <linux/init.h>
  11 extern int disable_apic;
  12
  13 #include <asm/mpspec.h>
  14 #include <asm/apic.h>
  15 #include <asm/io_apic.h>
  16 #include <asm/thread_info.h>
  17
  18 #ifdef CONFIG_SMP
  19
  20 #include <asm/pda.h>
  21
  22 struct pt_regs;
  23
  24 extern cpumask_t cpu_present_mask;
  25 extern cpumask_t cpu_possible_map;
  26 extern cpumask_t cpu_online_map;
  27 extern cpumask_t cpu_callout_map;
  28 extern cpumask_t cpu_initialized;
  29
  30 /*
  31  * Private routines/data
  32  */
  33
  34 extern void smp_alloc_memory(void);
  35 extern volatile unsigned long smp_invalidate_needed;
  36 extern void lock_ipi_call_lock(void);
  37 extern void unlock_ipi_call_lock(void);
  38 extern int smp_num_siblings;
  39 extern void smp_send_reschedule(int cpu);
  40 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
  41                                   void *info, int wait);
  42
  43 /*
  44  * cpu_sibling_map and cpu_core_map now live
  45  * in the per cpu area
  46  *
  47  * extern cpumask_t cpu_sibling_map[NR_CPUS];
  48  * extern cpumask_t cpu_core_map[NR_CPUS];
  49  */
  50 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
  51 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
  52 DECLARE_PER_CPU(u8, cpu_llc_id);
  53
  54 #define SMP_TRAMPOLINE_BASE 0x6000
  55
  56 /*
  57  * On x86 all CPUs are mapped 1:1 to the APIC space.
  58  * This simplifies scheduling and IPI sending and
  59  * compresses data structures.
  60  */
  61
  62 static inline int num_booting_cpus(void)
  63 {
  64         return cpus_weight(cpu_callout_map);
  65 }
  66
  67 #define raw_smp_processor_id() read_pda(cpunumber)
  68
  69 extern int __cpu_disable(void);
  70 extern void __cpu_die(unsigned int cpu);
  71 extern void prefill_possible_map(void);
  72 extern unsigned num_processors;
  73 extern unsigned __cpuinitdata disabled_cpus;
  74
  75 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  76
  77 #endif /* CONFIG_SMP */
  78
  79 #define safe_smp_processor_id()         smp_processor_id()
  80
  81 static inline int hard_smp_processor_id(void)
  82 {
  83         /* we don't want to mark this access volatile - bad code generation */
  84         return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
  85 }
  86
  87 /*
  88  * Some lowlevel functions might want to know about
  89  * the real APIC ID <-> CPU # mapping.
  90  */
  91 extern u8 __initdata x86_cpu_to_apicid_init[];
  92 extern void *x86_cpu_to_apicid_ptr;
  93 DECLARE_PER_CPU(u8, x86_cpu_to_apicid); /* physical ID */
  94 extern u8 bios_cpu_apicid[];
  95
  96 static inline int cpu_present_to_apicid(int mps_cpu)
  97 {
  98         if (mps_cpu < NR_CPUS)
  99                 return (int)bios_cpu_apicid[mps_cpu];
 100         else
 101                 return BAD_APICID;
 102 }
 103
 104 #ifndef CONFIG_SMP
 105 #define stack_smp_processor_id() 0
 106 #define cpu_logical_map(x) (x)
 107 #else
 108 #include <asm/thread_info.h>
 109 #define stack_smp_processor_id() \
 110 ({                                                              \
 111         struct thread_info *ti;                                 \
 112         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 113         ti->cpu;                                                \
 114 })
 115 #endif
 116
 117 static __inline int logical_smp_processor_id(void)
 118 {
 119         /* we don't want to mark this access volatile - bad code generation */
 120         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 121 }
 122
 123 #ifdef CONFIG_SMP
 124 #define cpu_physical_id(cpu)            per_cpu(x86_cpu_to_apicid, cpu)
 125 #else
 126 extern unsigned int boot_cpu_id;
 127 #define cpu_physical_id(cpu)            boot_cpu_id
 128 #endif /* !CONFIG_SMP */
 129 #endif
 130